Would life have appeared on Earth without oxygen?

I believe the first life to appear on Earth appeared in the oceans of Earth. When I ask if life would have appeared on Earth without oxygen, I am asking if life would have appeared in the oceans of Earth or on land without oxygen.

I believe the first life to appear on Earth appeared in the oceans of Earth. When I ask if life would have appeared on Earth without oxygen, I am asking if life would have appeared in the oceans of Earth or on land without oxygen.

Would life have appeared on Earth without oxygen?

Speculation about exobiology (which is in essence what you are asking about) is, at present, exactly that ... speculation. We just don't know enough about how other life might have evolved to say.